Flet Team Has Released Version 1.0
The open-source framework now supports production application development across eight different platforms.
Updated on Sept. 20, 2026 in Software
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The Flet team has officially launched version 1.0, marking the project's transition into a mature SDK for building production-ready applications. The release enables developers to deploy across Windows, macOS, Linux, iOS, Android, and web environments.
Why it matters
Flet 1.0 provides Python developers with a stabilized, cross-platform framework that leverages Flutter widgets for UI rendering. By consolidating its capabilities, the project aims to simplify the development process for diverse operating systems while maintaining support for both declarative and imperative coding styles.
The framework requires Python 3.10 or newer and utilizes a dart-bridge for Python-to-Dart communication. It now features an optimized event loop architecture for handlers and offers more than 100 packages in the index.
The players
Flet
An open-source software development kit designed to build multi-platform applications using Python.
The details
Flet 1.0 utilizes mobile-forge to automate wheel builds for mobile deployment while relying on Flutter widgets to handle graphical rendering. The SDK is currently available via PyPI under an Apache 2.0 license, allowing for broad integration across professional software stacks.
Timeline
The Flet project began development in 2022.
The team released Flet 1.0 in September 2026.
The Tech Race
Flet extends the capabilities of existing cross-platform ecosystems by bridging Python development with the rendering engine of the Flutter UI toolkit. This move signals a broader trend of bringing high-performance native UI tools into the versatile Python ecosystem.
Developers can now build production-grade applications that target eight platforms using a single codebase. The reliance on Python 3.10 and the improved control diffing speeds suggest significant workflow efficiency gains for teams managing complex UI states.
The takeaway
Flet 1.0 represents a significant milestone for Python-based mobile and desktop development by stabilizing the core API after four years of iteration. Developers should prioritize upgrading their environments to Python 3.10 or newer to ensure full compatibility with the new production-ready toolset.
Further reading
For more on evolving development tools, visit the Software section.
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Would you prefer building cross-platform apps using only one programming language?
